CN107892280A - A kind of high concentration SO2The method of metallurgical off-gas acid-making - Google Patents
A kind of high concentration SO2The method of metallurgical off-gas acid-making Download PDFInfo
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- CN107892280A CN107892280A CN201710977423.2A CN201710977423A CN107892280A CN 107892280 A CN107892280 A CN 107892280A CN 201710977423 A CN201710977423 A CN 201710977423A CN 107892280 A CN107892280 A CN 107892280A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
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Abstract
The invention discloses a kind of high concentration SO2The method of metallurgical off-gas acid-making, its acid preparation method include：Purification process, dry it is drawn through journey, conversion process and Finished product processThe.In metallurgical industry, most raw materials for metallurgy is metal sulfide, such as zinc sulphide, copper sulfide, and substantial amounts of sulfur dioxide flue gas can be produced in smelting, more serious to the damage ratio of environment, and as the SO in flue gas2When concentration is reached to a certain degree, then it can be turned waste into wealth using the method for metallurgical off-gas acid-making, both produce sulfuric acid, reached pollution reduction, the purpose of waste gas comprehensive utilization again.This method is using the invertibity of Sulphur Dioxide reaction, in high concentration SO2Flue gas during smelting enters before reactor, and carrying out reaction first with partial fume and diluent air, pure oxygen generates a small amount of sulfur trioxide, suppresses one layer of reaction temperature of converter.Due to the supplement of pure oxygen, reduce diluent air amount, reduce equipment size, reduce sulphuric acid plant operating cost.
Description
Technical field
The present invention relates to acid preparation method, more particularly to a kind of high concentration SO2The method of metallurgical off-gas acid-making.
Background technology
Flue gas during smelting is waste gas caused by smelting process, with SO in flue gas2A large amount of Sulphur ressources be present in form.China is sulphur money
Source scarcity state, a large amount of imported sulphurs are needed to meet domestic sulphur Chemical Manufacture needs every year.SO in reclaiming smelting flue gas2Produce industrial sulphur
Acid is the major way of current flue gas during smelting recycling treatment.
With the development of industrialization oxygenerating technology, oxygen-rich smelting technology is used widely, and progressively turns into newly-built smelting
The principal mode of production capacity, cause flue gas during smelting SO2Concentration is substantially improved, and reaches 30%, even more high.Flue gas during smelting SO2Concentration
It is substantially improved, the recovery to Sulphur ressource in flue gas during smelting brings great difficulty.According to traditional metallurgical off-gas acid-making technology, it is necessary to
For proportioning Macrodilution air to meet conversion reaction concentration (≤14%) requirement, this can cause sulphuric acid plant equipment size to increase,
The problems such as investment cost increases, and operating cost improves, and economic benefit declines to a great extent.
The content of the invention
The purpose of the present invention is to develop a kind of method that can reduce sulphuric acid plant operating cost.
The present invention technical solution be：A kind of high concentration SO2The method of metallurgical off-gas acid-making, the high concentration SO2Smelting
The method of refining flue gas acid preparing includes：Purification process, dry it is drawn through journey, conversion process and Finished product processThe.
Preferably, the purification process includes：
High concentration SO2Flue gas enters Venturi tube, and the dilute sulfuric acid contact mass transfer heat transfer with 15% or so of spray cools, and removes
Most of mine dust and other impurities, subsequently into foaming tower with 2-3% dilute sulfuric acid spray washings, further remove mine dust and other
Impurity, heat is moved by inter cooler and is cooled to 40 DEG C or so, acid mist is removed through electrostatic precipitator, acid mist is down to 0.03g/Nm3After enter
It is dry to be drawn through range drying tower；
15% dilute sulfuric acid of Venturi tube discharge is after inclined tube settler sedimentation separation mine dust, into circulation acid tank, from bubble
The 2-3% dilute sulfuric acids that the outlet of foam tower cyclic acid pump comes are exported by inclined tube settler draws, and enters the storage of diluted acid storage tank；Inclined tube settler
It is interrupted together with sludge and equipment terrace the flushing acid water of discharge through acid pond to be pumped to Sewage Disposal；
The 2-3% dilute sulfuric acids of foaming tower discharge enter to circulate acid tank, and the condensate liquid overflowed from inter cooler circulation acid tank is adjusted
Its concentration is saved, foaming tower spray is sent into by cyclic acid pump, increased diluted acid seals in Venturi tube circulation acid tank；Inter cooler is discharged cold
Lime set enters circulating slot, is interrupted with circulating pump or is continuously introduced into inter cooler spray；Acid mist under electrostatic precipitator removes follows into inter cooler
Annular groove；The process water of purification process supplement adds inter cooler circulating slot.
Preferably, the dry suction procedure is：
The furnace gas that auto purification process is come is with air adjustment SO2Concentration is to entering drying tower, the 93- through spray after 7.5-8%
94% sulfuric acid, which is dried, makes moisture be down to 0.1g/Nm3, and enter conversion process after tower top wire mesh demister removes sour foam；
The sulfuric acid after moisture is absorbed in drying tower and flows into circulating slot, is tieed up with 98% sulfuric acid that a suction tower circulation acid system seals in
Its concentration is held, drying tower acid cooler is sent into cyclic acid pump, drying tower spray is entered after cooling；The 93-94% sulphur increased
Acid seals in a suction tower circulating slot；
First time conversion gas from conversion process is partly into oleum absorption tower, absorbs most of SO3Into
One inhales tower, and a part is directly entered a suction tower, absorbs SO3Furnace gas after tower top wire mesh demister removes sour foam, return to conversion
Two sections carry out second and convert；
Oleum absorption tower is with 104.5% oleum spray-absorption SO2Oleum after concentration rise, which enters, to follow
Annular groove inhales 98% acid that Tower System string comes by one and adjusts its concentration, is pumped into after acid cooler cools to circulate and enters absorption tower
Spray, 104.5% oleum product of generation enter Finished product processThe；
First absorption tower is sprayed with 98% sulfuric acid, absorbs SO3Sulfuric acid after concentration rise flows into circulating slot, is incorporated drying tower
93% sulfuric acid that circulatory system string comes, and add water to maintain its concentration, being sent into a suction tower acid cooler with cyclic acid pump cools
After enter a suction tower spray；The 98% sulfuric acid part string increased to drying tower circulating slot, a part is sent into finished product as finished acid
Sour measuring tank；
Second of the conversion gas from conversion process enters second absorption tower, absorbs SO3And removed through tower top wire mesh demister
It is vented after removing sour foam by chimney；
Second absorption tower is sprayed with 98% sulfuric acid, absorbs SO3The elevated sulfuric acid of concentration flows into circulating slot, adds clear water regulation
Its concentration, it is sent into cyclic acid pump after two suction tower acid coolers cool and enters two suction towers spray；98% sulfuric acid increased seals in
One inhales tower circulating slot；
System can produce 98% sulfuric acid or 93% sulfuric acid by the market demand；When needing 93% sulfuric acid, by drying tower system
The sulfuric acid of output 93%；When needing 98% sulfuric acid the sulfuric acid of Tower System output 98% is inhaled by one.
Preferably, the conversion process process includes：
In high concentration SO2Flue gas during smelting enters before reactor, is carried out first with partial fume and diluent air, pure oxygen anti-
A small amount of sulfur trioxide should be generated, suppresses one layer of reaction temperature of converter；Furthermore from dry absorption section drying tower SO2Concentration is
7.5-8% furnace gas, through SO2Air blower boosting, the IIIth heat exchanger and the Ith heat exchanger shell-side and pipe side SO3Gas exchanges heat, temperature liter
Enter converter after to 430 DEG C and carry out first time conversion；Through one, two, three section of catalyst reaction conversion ratio up to 92% conversion gas, enter
Enter the IIIth Tube Sheet of Heat Exchanger side and carry out first time absorption with entering the absorption tower of dry absorption section first after the heat exchange cooling of shell-side furnace gas；SO3
Gas after being absorbed is through the Vth heat exchanger, the IVth heat exchanger, the IIth heat exchanger shell-side and pipe side SO3Gas heat exchange is warming up to 420
DEG C enter converter and carry out second and convert；Through the 4th, the 5th section of catalyst reaction total conversion up to 99.7%；Secondary conversion gas
Through the Vth Tube Sheet of Heat Exchanger side and shell-side SO2Enter dry absorption section second absorption tower after gas heat exchange cooling and carry out second of absorption；Conversion
Device goes into operation heating, is carried out with electric heater heat drying air.
Preferably, the Finished product processThe includes：
Enter measuring tank by 93% sulfuric acid of drying tower system output or by 98% sulfuric acid of a suction Tower System output, with position
Difference flows into basin storage；104.5% oleum is directly entered basin storage；Product sulfuric acid is transported outward with automobile；
Chemical equation：
1. boiling roaster：FeS2+O2=Fe2O3+SO2；
2. reburner：SO2+O2=SO3；
3. absorption tower：SO3+H2O=H2SO4。
Preferably, the mode for supplementing pure oxygen in this method to relieving haperacidity conversion system reduces blower fan load and equipment size.
The beneficial effects of the invention are as follows：This method is using the invertibity of Sulphur Dioxide reaction, in high concentration SO2Smelting
Refine flue gas to enter before reactor, carrying out reaction first with partial fume and diluent air, pure oxygen generates a small amount of sulfur trioxide, suppression
One layer of reaction temperature of converter processed.Due to the supplement of pure oxygen, reduce diluent air amount, reduce equipment size, reduce system
Sour plant running expense.
Embodiment
A kind of high concentration SO2The method of metallurgical off-gas acid-making, high concentration SO2The method of metallurgical off-gas acid-making includes：It is cleaned
Journey, dry it is drawn through journey, conversion process and Finished product processThe.
Preferably, purification process includes：
High concentration SO2Flue gas enters Venturi tube, and the dilute sulfuric acid contact mass transfer heat transfer with 15% or so of spray cools, and removes
Most of mine dust and other impurities, subsequently into foaming tower with 2-3% dilute sulfuric acid spray washings, further remove mine dust and other
Impurity, heat is moved by inter cooler and is cooled to 40 DEG C or so, acid mist is removed through electrostatic precipitator, acid mist is down to 0.03g/Nm3After enter
It is dry to be drawn through range drying tower；
15% dilute sulfuric acid of Venturi tube discharge is after inclined tube settler sedimentation separation mine dust, into circulation acid tank, from bubble
The 2-3% dilute sulfuric acids that the outlet of foam tower cyclic acid pump comes are exported by inclined tube settler draws, and enters the storage of diluted acid storage tank；Inclined tube settler
It is interrupted together with sludge and equipment terrace the flushing acid water of discharge through acid pond to be pumped to Sewage Disposal；
The 2-3% dilute sulfuric acids of foaming tower discharge enter to circulate acid tank, and the condensate liquid overflowed from inter cooler circulation acid tank is adjusted
Its concentration is saved, foaming tower spray is sent into by cyclic acid pump, increased diluted acid seals in Venturi tube circulation acid tank；Inter cooler is discharged cold
Lime set enters circulating slot, is interrupted with circulating pump or is continuously introduced into inter cooler spray；Acid mist under electrostatic precipitator removes follows into inter cooler
Annular groove；The process water of purification process supplement adds inter cooler circulating slot.
Preferably, doing suction procedure is：
The furnace gas that auto purification process is come is with air adjustment SO2Concentration is to entering drying tower, the 93- through spray after 7.5-8%
94% sulfuric acid, which is dried, makes moisture be down to 0.1g/Nm3, and enter conversion process after tower top wire mesh demister removes sour foam；
The sulfuric acid after moisture is absorbed in drying tower and flows into circulating slot, is tieed up with 98% sulfuric acid that a suction tower circulation acid system seals in
Its concentration is held, drying tower acid cooler is sent into cyclic acid pump, drying tower spray is entered after cooling；The 93-94% sulphur increased
Acid seals in a suction tower circulating slot；
First time conversion gas from conversion process is partly into oleum absorption tower, absorbs most of SO3Into
One inhales tower, and a part is directly entered a suction tower, absorbs SO3Furnace gas after tower top wire mesh demister removes sour foam, return to conversion
Two sections carry out second and convert；
Oleum absorption tower is with 104.5% oleum spray-absorption SO2Oleum after concentration rise, which enters, to follow
Annular groove inhales 98% acid that Tower System string comes by one and adjusts its concentration, is pumped into after acid cooler cools to circulate and enters absorption tower
Spray, 104.5% oleum product of generation enter Finished product processThe；
First absorption tower is sprayed with 98% sulfuric acid, absorbs SO3Sulfuric acid after concentration rise flows into circulating slot, is incorporated drying tower
93% sulfuric acid that circulatory system string comes, and add water to maintain its concentration, being sent into a suction tower acid cooler with cyclic acid pump cools
After enter a suction tower spray；The 98% sulfuric acid part string increased to drying tower circulating slot, a part is sent into finished product as finished acid
Sour measuring tank；
Second of the conversion gas from conversion process enters second absorption tower, absorbs SO3And removed through tower top wire mesh demister
It is vented after removing sour foam by chimney；
Second absorption tower is sprayed with 98% sulfuric acid, absorbs SO3The elevated sulfuric acid of concentration flows into circulating slot, adds clear water regulation
Its concentration, it is sent into cyclic acid pump after two suction tower acid coolers cool and enters two suction towers spray；98% sulfuric acid increased seals in
One inhales tower circulating slot；
System can produce 98% sulfuric acid or 93% sulfuric acid by the market demand；When needing 93% sulfuric acid, by drying tower system
The sulfuric acid of output 93%；When needing 98% sulfuric acid the sulfuric acid of Tower System output 98% is inhaled by one.
Preferably, conversion process process includes：
In high concentration SO2Flue gas during smelting enters before reactor, is carried out first with partial fume and diluent air, pure oxygen anti-
A small amount of sulfur trioxide should be generated, suppresses one layer of reaction temperature of converter；Furthermore from dry absorption section drying tower SO2Concentration is
7.5-8% furnace gas, through SO2Air blower boosting, the IIIth heat exchanger and the Ith heat exchanger shell-side and pipe side SO3Gas exchanges heat, temperature liter
Enter converter after to 430 DEG C and carry out first time conversion；Through one, two, three section of catalyst reaction conversion ratio up to 92% conversion gas, enter
Enter the IIIth Tube Sheet of Heat Exchanger side and carry out first time absorption with entering the absorption tower of dry absorption section first after the heat exchange cooling of shell-side furnace gas；SO3
Gas after being absorbed is through the Vth heat exchanger, the IVth heat exchanger, the IIth heat exchanger shell-side and pipe side SO3Gas heat exchange is warming up to 420
DEG C enter converter and carry out second and convert；Through the 4th, the 5th section of catalyst reaction total conversion up to 99.7%；Secondary conversion gas
Through the Vth Tube Sheet of Heat Exchanger side and shell-side SO2Enter dry absorption section second absorption tower after gas heat exchange cooling and carry out second of absorption；Conversion
Device goes into operation heating, is carried out with electric heater heat drying air.
Preferably, Finished product processThe includes：
Enter measuring tank by 93% sulfuric acid of drying tower system output or by 98% sulfuric acid of a suction Tower System output, with position
Difference flows into basin storage；104.5% oleum is directly entered basin storage；Product sulfuric acid is transported outward with automobile；
Chemical equation：
1. boiling roaster：FeS2+O2=Fe2O3+SO2；
2. reburner：SO2+O2=SO3；
3. absorption tower：SO3+H2O=H2SO4。
Preferably, the mode for supplementing pure oxygen in this method to relieving haperacidity conversion system reduces blower fan load and equipment size.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any mark in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (6)
- A kind of 1. high concentration SO2The method of metallurgical off-gas acid-making, it is characterised in that the high concentration SO2The side of metallurgical off-gas acid-making Method includes：Purification process, dry it is drawn through journey, conversion process and Finished product processThe.
- A kind of 2. high concentration SO according to claim 12The method of metallurgical off-gas acid-making, it is characterised in that described cleaned Journey includes：High concentration SO2Flue gas enters Venturi tube, and the dilute sulfuric acid contact mass transfer heat transfer with 15% or so of spray cools, and removes big portion Divide mine dust and other impurities, subsequently into foaming tower with 2-3% dilute sulfuric acid spray washings, further remove mine dust and other are miscellaneous Matter, heat is moved by inter cooler and is cooled to 40 DEG C or so, acid mist is removed through electrostatic precipitator, acid mist is down to 0.03g/Nm3Enter afterwards dry It is drawn through range drying tower；15% dilute sulfuric acid of Venturi tube discharge is after inclined tube settler sedimentation separation mine dust, into circulation acid tank, from foaming tower The 2-3% dilute sulfuric acids that cyclic acid pump outlet comes are exported by inclined tube settler draws, and enters the storage of diluted acid storage tank；Inclined tube settler is interrupted The sludge of discharge and equipment terrace are rinsed together with acid water through acid pond to be pumped to Sewage Disposal；The 2-3% dilute sulfuric acids of foaming tower discharge enter to circulate acid tank, and the condensate liquid overflowed from inter cooler circulation acid tank adjusts it Concentration, foaming tower spray is sent into by cyclic acid pump, increased diluted acid seals in Venturi tube circulation acid tank；The condensate liquid of inter cooler discharge Enter circulating slot, be interrupted with circulating pump or be continuously introduced into inter cooler spray；Acid mist under electrostatic precipitator removes enters inter cooler circulating slot； The process water of purification process supplement adds inter cooler circulating slot.
- A kind of 3. high concentration SO according to claim 12The method of metallurgical off-gas acid-making, it is characterised in that described dry to be drawn through Journey process is：The furnace gas that auto purification process is come is with air adjustment SO2Concentration is to entering drying tower after 7.5-8%, the 93-94% sulphur through spray Acid drying makes moisture be down to 0.1g/Nm3, and enter conversion process after tower top wire mesh demister removes sour foam；The sulfuric acid after moisture is absorbed in drying tower and flows into circulating slot, it is maintained with 98% sulfuric acid that a suction tower circulation acid system seals in Concentration, drying tower acid cooler is sent into cyclic acid pump, drying tower spray is entered after cooling；The 93-94% sulfuric acid strings increased Enter a suction tower circulating slot；First time conversion gas from conversion process is partly into oleum absorption tower, absorbs most of SO3Inhaled into one Tower, a part are directly entered a suction tower, absorb SO3Furnace gas after tower top wire mesh demister removes sour foam, return to two sections of conversion Second is carried out to convert；Oleum absorption tower is with 104.5% oleum spray-absorption SO2Concentration rise after oleum enter circulating slot by One, which inhales 98% acid that Tower System string comes, adjusts its concentration, is pumped into circulation after acid cooler cools and enters absorption tower spray, Generate 104.5% oleum product and enter Finished product processThe；First absorption tower is sprayed with 98% sulfuric acid, absorbs SO3Sulfuric acid after concentration rise flows into circulating slot, supplying drying tower circulation 93% sulfuric acid that system string comes, and add water to maintain its concentration, it is sent into after a suction tower acid cooler cools with cyclic acid pump One inhales tower spray；The 98% sulfuric acid part string increased to drying tower circulating slot, a part is sent into finished acid meter as finished acid Measuring tank；Second of the conversion gas from conversion process enters second absorption tower, absorbs SO3And remove sour foam through tower top wire mesh demister It is vented afterwards by chimney；Second absorption tower is sprayed with 98% sulfuric acid, absorbs SO3The elevated sulfuric acid of concentration flows into circulating slot, and it is dense that addition clear water adjusts its Degree, it is sent into cyclic acid pump after two suction tower acid coolers cool and enters two suction towers spray；98% sulfuric acid increased seals in a suction Tower circulating slot；System can produce 98% sulfuric acid or 93% sulfuric acid by the market demand；When needing 93% sulfuric acid, by drying tower system output 93% sulfuric acid；When needing 98% sulfuric acid the sulfuric acid of Tower System output 98% is inhaled by one.
- A kind of 4. high concentration SO according to claim 12The method of metallurgical off-gas acid-making, it is characterised in that described transformed Journey process includes：In high concentration SO2Flue gas during smelting enters before reactor, and reaction life is carried out first with partial fume and diluent air, pure oxygen Into a small amount of sulfur trioxide, suppress one layer of reaction temperature of converter；Furthermore from dry absorption section drying tower SO2Concentration is 7.5-8% Furnace gas, through SO2Air blower boosting, the IIIth heat exchanger and the Ith heat exchanger shell-side and pipe side SO3Gas exchanges heat, and temperature rises to 430 DEG C After enter converter carry out first time conversion；Conversion gas through one, two, three section of catalyst reaction conversion ratio up to 92%, into the IIIth Tube Sheet of Heat Exchanger side carries out first time absorption with entering the absorption tower of dry absorption section first after the heat exchange cooling of shell-side furnace gas；SO3Absorbed Gas afterwards is through the Vth heat exchanger, the IVth heat exchanger, the IIth heat exchanger shell-side and pipe side SO3Gas heat exchange is warming up to 420 DEG C of entrance Converter carries out second and converted；Through the 4th, the 5th section of catalyst reaction total conversion up to 99.7%；Secondary conversion gas is through the Vth Tube Sheet of Heat Exchanger side and shell-side SO2Enter dry absorption section second absorption tower after gas heat exchange cooling and carry out second of absorption；Converter goes into operation Heating, carried out with electric heater heat drying air.
- A kind of 5. high concentration SO according to claim 12The method of metallurgical off-gas acid-making, it is characterised in that the finished product mistake Journey includes：Enter measuring tank by 93% sulfuric acid of drying tower system output or by 98% sulfuric acid of a suction Tower System output, with potential difference stream Enter basin storage；104.5% oleum is directly entered basin storage；Product sulfuric acid is transported outward with automobile；Chemical equation：1. boiling roaster：FeS2+O2=Fe2O3+SO2；2. reburner：SO2+O2=SO3；3. absorption tower：SO3+H2O=H2SO4。
- A kind of 6. high concentration SO according to claim 12The method of metallurgical off-gas acid-making, it is characterised in that in this method to The mode of relieving haperacidity conversion system supplement pure oxygen reduces blower fan load and equipment size.
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| CN108483410A (en) * | 2018-05-23 | 2018-09-04 | 中石化南京工程有限公司 | A kind of high concentration SO2The device and method of gas pre-inversion Sulphuric acid |
| CN108502848A (en) * | 2018-05-14 | 2018-09-07 | 山东方泰循环金业股份有限公司 | A kind of technique preparing sulfuric acid using copper blast furnace off-gas |
| CN110124510A (en) * | 2019-01-29 | 2019-08-16 | 浙江天能电源材料有限公司 | A method of utilizing oxygen-enriched side-blowing smelting lead extracting sulfuric acid |
| CN110155955A (en) * | 2019-04-01 | 2019-08-23 | 安阳市岷山有色金属有限责任公司 | A kind of production method for producing electronic-grade sulfuric acid using Flue Gas of Nonferrous Smelting |
| CN111115587A (en) * | 2020-01-19 | 2020-05-08 | 长沙华时捷环保科技发展股份有限公司 | Method and system for preparing analytically pure sulfuric acid from smelting flue gas |
| CN111994878A (en) * | 2020-09-04 | 2020-11-27 | 太和县大华能源科技有限公司 | Method for recycling sulfuric acid from waste acid recovered from lead-acid battery |
| CN113148962A (en) * | 2021-01-19 | 2021-07-23 | 昆明理工大学 | Device and method for preparing acid from smelting flue gas by using hydrogen peroxide and activated carbon |
| CN113213433A (en) * | 2021-04-14 | 2021-08-06 | 中国恩菲工程技术有限公司 | Method for directly preparing sulfuric acid for storage battery by using secondary lead smelting flue gas |
| CN113620256A (en) * | 2021-07-19 | 2021-11-09 | 广西华远金属化工有限公司 | Acid making method in antimony smelting process of oxygen-enriched side-blown column smelting |
| CN113893671A (en) * | 2021-10-09 | 2022-01-07 | 长沙有色冶金设计研究院有限公司 | Method for wet denitration of high-sulfur flue gas |
| CN114457243A (en) * | 2021-12-09 | 2022-05-10 | 华刚矿业股份有限公司 | Oxygen-enriched roasting method of high-copper low-sulfur copper sulfide concentrate and cathode copper |
| CN114671412A (en) * | 2022-05-17 | 2022-06-28 | 四川东立科技股份有限公司 | Process for preparing sulfuric acid by blending and burning ferrous sulfate with sulfur concentrate |
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| CN108483410A (en) * | 2018-05-23 | 2018-09-04 | 中石化南京工程有限公司 | A kind of high concentration SO2The device and method of gas pre-inversion Sulphuric acid |
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